The right move, preparing to take the knight to d4.
9. d5e6 Aronian decides to exploit Black's move order. Taking the knight to g3 or f4 and then completing development is also playable. 9... f7e6 This capture is necessary, since it's not easy to defend the d6-pawn after 10. c1f4 Forcing Black to advance the pawn to e5 in order to protect d6. 10... e6e5  11. f4g5 The knight now goes to d5, gaining a tempo by attacking the queen. White's position is comfortable and easier to play, although the advantage is not as big as I thought.